Features

ICO creator

Build a multi-resolution .ico file from any image — 16×16 through 256×256 sizes embedded in one favicon-ready file.

What is an ICO file?

The .ico format is a container used primarily by Windows for application icons, taskbar icons, file type icons, and browser favicons. Unlike a single-resolution image, an .ico file embeds multiple resolutions inside a single file — typically 16×16, 32×32, 48×48, and 256×256 pixels.

The operating system picks the most appropriate size automatically depending on where the icon is displayed:

16×16 — browser address bar favicon, small taskbar icon
32×32 — standard taskbar, desktop shortcut
48×48 — Windows Explorer file view
256×256 — high-DPI displays, large icon view

Browsers also read .ico files as favicon sources (<link rel="icon" href="/favicon.ico">).

How it works

Upload your image (PNG, JPG, WebP, or any other browser-supported format).
The tool renders your image into a canvas at each selected size using bilinear downsampling.
Each size is encoded as a PNG inside the ICO container.
All sizes are assembled into a single .ico file that downloads to your device.

Everything happens in your browser — your image is never uploaded to a server.

Selecting sizes

You can select which resolutions to include. For a standard favicon, the recommended set is: 16, 32, 48, and 256. For a Windows application icon, include all six sizes: 16, 32, 48, 64, 128, and 256.

Smaller files (only 16 and 32) are fine for browser-only favicon use. Larger icons matter most for Windows Explorer and high-DPI desktop shortcuts.

Tips for best results

Start from a square image. ICO sizes are always square. If your source image is not square, the tool will embed it as-is — consider squaring it in the Image Editor first (Background → canvas fill).
Use a high-resolution source. Starting from a 512×512 or larger source gives cleaner downsamples at 16×16 and 32×32. The AI upscaler can help if your source is small.
Dark icons need light backgrounds for the 16×16 size — at tiny sizes a dark icon disappears on dark taskbars. Consider adding a light background for the smallest sizes.

Continue editing in the Image Editor

After generating your ICO file, you can open the 256×256 preview directly in the Image Editor to apply background removal, filters, or adjustments before re-exporting.

Favicon deployment

To use your .ico as a web favicon, place it at your site root as favicon.ico. Modern browsers also accept SVG and PNG favicons declared in <link> tags, but favicon.ico at the root is the universal fallback.

For Next.js projects, place favicon.ico in the app/ directory — it is served automatically.

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